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Finding the Fourth Proportional to 1,062.09, 1,591.08 and 695.76

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Solution

The fourth proportional to 1,062.09, 1,591.08 and 695.76 is: 1,042.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.09 : 1,591.08 = 695.76 : x
  2. Step 2: Convert to fraction form
    1,062.09/1,591.08 = 695.76/x
  3. Step 3: Cross multiply
    1,062.09x = 1,591.08 × 695.76
  4. Step 4: Simplify right side
    1,062.09x = 1,107,009.82
  5. Step 5: Solve for x
    x = 1,107,009.82/1,062.09
  6. Step 6: Final answer
    x = 1,042.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.